These results are in line with the idea that dopamine regulates decision thresholds during reinforcement learning, and may help to bridge action selection and response vigor accounts of dopamine.
The role of dopamine in signalling reward prediction errors is well established, but its involvement in more complex decision-making processes is less clear. In recent work, Kocharian et al. demonstrate that dopamine also encodes imagined outcomes and decision confidence, revealing a richer, more nuanced role in learning and behaviour.
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Introduction Decision making under risk is an important area of investigation at the confluence of economics, psychology, and neuroscience. Although much is known about its neural underpinnings, the precise role of at least one major ingredient, the neuromodulator dopamine, remains unclear. Motivational theories of choice focus on the influence of goal values and strength of reinforcement to explain behavior. By contrast relatively little is known concerning how the cost of an action, such as effort expended, contributes to a decision to act. Effort-based decision making addresses how ... Key points Unresolved conflict can activate dopamine-driven feedback loops that keep arguments replaying in the mind. Dopamine drives anticipation and motivation, making conflict feel compelling ...
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Key points Unresolved conflict can activate dopamine-driven feedback loops that keep arguments replaying in the mind. Dopamine drives anticipation and motivation, making conflict feel compelling ...
